 Fun way to learn about the relationships between geometric shapes. Great way to develop Logic, and Spatial Smarts. $15.99 Sale! $11.19 |  Race against the clock, using differently shaped building blocks to create totally unique structures. Great for development of Spatial Smarts. $29.99 Sale! $20.99 |  Encourage creative thinking as well as visual problem-solving skills with this big design set. $23.99 Sale! $16.79 |