Three pals vie for the “best potato” prize at a county fair, only to be stalked by a sadistic chef seeking a base for chowder. James E. Grote’s adaptation of Toby Speed’s kids’ book offers lessons in teamwork and underdog achievement, and George Howe’s music and lyrics–ranging from disco to a Les Miz-style freedom anthem–give the show mischievous humor (a good poop rhyme is funny at any age). Director Shole Milos’s animated, agile performers take on multiple roles, belt the tunes with aplomb, and pull off some graceful moves considering the challenges of overstuffed potato suits. The only problem is that, being so lovable, these spuds give children another reason to avoid eating their veggies. Through 6/4: Sat 11 AM and 1 PM, Sun 1 PM, Lifeline Theatre, 6912 N. Glenwood, 773-761-4477, $9, “pay what you can” at the door.