Crafted from select hardwood and accented with childsafe dyes, Stacking Cars feature bright colors, a clever contour that stacks in any combination and easyroll wheels that are simple for babies and toddlers to spin.They're ideal for young toddlers improving handeye coordination and becoming more interested in imitating the real world around them.And with lots of colorful interest and raceready wheels, they will keep older toddlers and preschoolers busy building sorting skills and vocabulary, and initiating a world of imaginative play!