Preschoolers use these 5 in. x 3 in. card-stock boxcars on Day 1 of Craft & Play. After customizing their own boxcars, they?ll fill them up with cargo, ?drive? them to the Crew bucket, and dump the cargo out. It?s a great example for little ones of how Jesus? power helps us do hard things! You?ll need one Billy Boxcar per preschooler.