Ah… now I get it… 
That segues right into another bunch:
Hapless bald kid with sweater w/zigzag stripe.
Aforementioned Beagle
Wise/geeky kid with blanket, sucking thumb
Music snob kid with mini-piano
Irate Fussbudget girl brandishing fist
Bluff Tomboyish girl with baseball bat
Grimy slobbish kid (how do you sculpt a cloud of dust?)
some might have special abilities:
"not-Pigpen"--smokescreen/teargas effect at close range
"not-Linus"--use of blanket as whip/sling.