Each of the 36 markers in this smart travel set shares its cap with another, making it simple to pack the full set in their included plastic case that’s just 7.5” high. Because the Double Up! 2-in-1 Mini Markers’ caps stay put on the marker that’s not in use, it’s that much harder for kids to misplace them. The washable inks provide a mess-free experience for young travelers as well as their parents. Tuck the Double Up! 2-in-1 Mini Markers away in a backpack, glove compartment or tote for a fun coloring experience wherever you go. Ages 3+.