If you like Mash'ems, you'll love these new STACK'EMS! Featuring the Paw Patrol Sea Patrol Collection, Stack'ems are squishy stackable fun with 2 new exciting ways to play! You can play with and stack both the squishies and the cases! There are 12 characters to collect, including the new CRYSTAL characters! And like the usual mash'ems, you can squish 'em, twist 'em and mash 'em however you want! Collect and stack Chase, Marshall, Rubble, Rocky, Zuma and Skye in both regular an CRYSTAL characters!