3 years & up. Supplement the mathematical and social emotional activities of Block Science play with Block Science People. The rubberwood people are easily identified with over-molded mathematical symbols on soft plastic grips. Aspiring drivers can send their Block Science People on adventures in the Block Science Cars that feature over-molded plastic wheels that clip onto 2 smooth sanded rubberwood car units with seats for both a driver and passenger. Use the secure hitches to make an extended moveable unit. Compatible with any Block Science Foundation Sets (sold separately). Set includes 3 Adult Figures, 5 Children Figures, 2 Rubberwood Cars, 4 Car Clips, and 2 Hitches.