Melissa amp doug stacking cars crafted from select hardwood and accented with child safe dyes stacking cars feature bright colours a clever contour that stacks in any combination and easy roll wheels that are simple for babies and toddlers to spin they039re ideal for young toddlers improving hand eye coordination and becoming more interested in imitating the real world around them and with lots of colourful interest and race ready wheels they will keep older toddlers and pre schoolers