Amazon offers Prime members the SmartLab Toys Motorblox Robot Lab for $10.28 with free shipping. (Non-members can spend $35 or more to qualify for free shipping; otherwise, shipping costs $4.75.) That's $4 under our mention from two weeks ago and the lowest total price we've seen. (It's the best deal today by $14.) This kit allows you to make three different models, which can then be customized with LEGO bricks.