With orders of $25 or more, Amazon offers Prime members the LEGO Duplo My First Plane Set for $2.50 with free shipping. That's at least $2 less than you'd spend at a local retail store. This 10-piece kit is designed for ages 1.5 to 3.

Note: This item is offered as part of Amazon's "add-on program" and can only be purchased with an order of $25 or more.