Add a Droid Inventor Kit and a Rule Your Room Kit to your cart at LittleBits to automatically drop your total from $179.99 to $99.99. Plus the shipping is free. This is the best price we found for both kits purchased together by $29. These kits are intended for kids in grades 3-8. The Droid Kit comes with everything your kids would need to build, customize, and program their own droid, while the Rule Your Room Kit comes with accessories for creating custom inventions. Both kits are designed to offer an introduction into STEM/STEAM fields. There is no sales tax.