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About Us is upfront

Customer Service and Store Policies

  1. Payment, Pricing and Promotions
  2. Sales Tax
  3. Shipping and Product Availability
  4. Backorders and Returns
  5. Science Kits Safety: What Parents Need to Know

Payment, Pricing and Promotions

Payment Methods

We accept Visa, MasterCard, American Express and Discover credit cards and PayPal payments. When you use your credit card, you will be asked to provide your credit card billing address, if different from the shipping address, and daytime/evening phone numbers. If the billing address you give us does not match the one that is on file at the financial institution, or if authorization is not given for any reason, we reserve the right to cancel the order without notification. In this case you will need to resolve the problem with the financial institution and reorder.

If paying with PayPal, go through our normal checkout process choosing PayPal as your payment method.

COD orders are not accepted at this time.

Purchase Orders

Yes, we gladly accept school purchase orders. To place your order please follow these steps:

1. Fax your purchase order to (408) 369 1018
email your purchase order to

Note: purchase order must be your official school form and must be signed. If you include your email address, we will automatically email the order confirmation and tracking number. For your reference our corporate information is:

Science Castle LLC
P.O.Box 112062
Campbell, CA 95011-2062, USA
1-888-501-8680 (phone)

2. We will enter your order in our system and send you an invoice.

3. Invoice is due upon receipt. Please pay promptly.

Credits and Balances Due

Any credits on your account with us will be refunded promptly. We will use the same method to refund the amount as you used when you placed the order.

Price and/or Description Changes

All prices, pictures, and descriptions on this site are subject to change. We maintain no responsibility for inadvertent errors. Please contact us within 30 days regarding price or promotion discrepancies.

When you place your order with us, you agree to the price and terms indicated on our web site. Price differences related to future or past prices in our store or any other store are not refundable.

Promotional Offers

When taking advantage of the promotional offer, be sure to read the entire list of restrictions associated with that promotion. If your order does not seem to reflect all the benefits mentioned in the promotion, you may want to review the specific promotion's restrictions.

To qualify for a specific promotion, your order must be placed during the specified promotion period. We are unable to apply special discounts to items ordered before or after the dates of a promotional offer.

Sales Tax

Orders Subject to Sales Tax

Companies selling over the Internet are subject to the same sales tax collection requirements as any other retailers. The amount of tax charged depends upon many factors, including the identity of the seller, the type of item purchased, and the destination of the shipment.

Items sold by Science Castle LLC, and shipped to destinations in the state of California are subject to tax.

For sales tax purposes, electronically delivered products (e-books, e-documents, and electronically delivered software) are considered to be shipped to your credit card billing address.

How Tax is Calculated

If an item is subject to sales tax in the state to which the order is shipped, tax is generally calculated on the total selling price of each individual item. In accordance with state tax laws, the total selling price of an item will generally include item-level shipping and handling charges, item-level discounts, and an allocation of order-level shipping and handling charges and order-level discounts.

The tax rate applied to your order will generally be the combined state and local rate for the address where your order was shipped. Therefore, the sales tax rate applied to your order may be different for an order shipped to your home address than it is for an order for the very same items shipped to your work address. obtains sales tax rates from a leading tax rate service provider.

Shipping and Product Availability


For in-stock items: order before 8pm PST for the order to be shipped the next business day. Delivery time will depend on the shipping method you select and availability of the items. We ship via USPS. The following shipping methods are currently available: Ground (5-7 business days), Priority Mail, Express Mail.

Product Availability

Products are generally kept in-stock and available for immediate shipment. If your order contains an item that is out of stock, the rest of your order (except the out-of-stock item) will be promptly shipped. You will be notified via email of any delays and given a best estimate on when the item will be available for shipment.

Backorders and Returns


We make our goal to provide you with the accurate availability information on the website and ship your order promptly. In rare case of item unavailability, you will usually be notified by email if your order cannot be shipped within a few days after you placed it. We will also provide you with the date when we expect the product to be available. You will have an option to cancel your order if you don't want to wait.

Returning Merchandise

When you receive your order, always keep the paperwork that is included with it in case you wish to return or exchange an item. Also, save any emails you receive about you order, as they may provide important information.

A return merchandise authorization (RMA) is required for all returns. You can request an RMA by calling 1-888-501-8680 or emailing us at

Returns can only be requested within 30 days of the product shipment date. Shipping costs will not be refunded. Items that qualified for free shipping will be charged a 10% shipping/handling fee.

Any shipments returned because they are undeliverable to the shipping address or any packages refused will be refunded less actual shipping and handling charges.

Returned items must be in their original packaging and in new condition, or they will be rejected.

Defective Returns

If the item you wish to return is inoperable but has no apparent damage, it is considered defective. If you receive defective merchandise, please call 1-888-501-8680 or email for assistance.

Damaged Returns

Damaged merchandise includes items that have been damaged in shipping. If a shipment arrives at your door with obvious shipping damage, please refuse the delivery. If you have already accepted delivery and then find shipping damage, please 1-888-501-8680 or email immediately. If you receive damaged merchandise, please save all packaging material and paperwork.

Science Kits Safety: What Parents Need to Know

All Thames & Kosmos science kits currently on the market conform to all applicable sections of the European Safety Standards for Toys, EN-71, and are thus CE marked. In most cases, these standards are more stringent than the US safety standards dictated by the Code of Federal Regulations (CFR), Commercial Practices, part 16, and the Consumer Product Safety Improvement Act (CPSIA), as well as the standards dictated by the American Society for Testing and Materials (ASTM) F963 Standard Consumer Safety Specification on Toy Safety, which is mandatory for products manufactured after February 2009.

When thinking about the safety of science kits, it is important to remember that science kits are not simply toys for play. None of our science kits are intended for children under the age of 5 years, and all of our kits require the presence and supervision of a responsible parent or adult. The instruction manuals always provide important safety advice to children, parents and adults, as well as first aid advice when applicable.

Some common safety precautions apply to all of our science kits:

  1. A responsible parent or adult must always supervise the experimentation.
  2. All users must read the manuals thoroughly before experimentation and follow all instructions and safety advice prescribed in the manuals.
  3. The manual and packaging must always be kept ready for reference.
  4. The kits must be kept away from small children (children under 5 years).
  5. Caution must be used in handling any objects with sharp points or edges, or that may break to yield sharp points or edges.
  6. Never put any of the parts in your mouth.
  7. Always wash your hands after experimenting with our kits.

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