A construction system with gears that teaches simple mechanics. The animal theme makes it appealing to young children. Age 3+.

Create your own marble runs with this exciting construction set. Age 4+.

This kit includes 150 building cards and a knight. The book gives pictorial and written instructions about how to build basic structures with the cards using slot-together construction. The child is then challenged to build one of a variety of other castles. Ages 8 and up.

Bigmag magnetic construction toy by Treasure Trove Toys is ideal for pre-school children to explore building 3 dimensionally. Age 1+.