There is the Chibi Room, which is a room that has crafts and activities geared towards our 12 and under attendees. There are a variety of crafts scheduled (making a miniature Japanese garden, fish kits, origami), manga drawing and coloring, or even learning a some Japanese. There's different activities scheduled for each day... Jess, the coordinator, has some fun things planned.
There is also the plushie-making or fandom bears making that is being offered in the Creation Station, or cat ears in the dealer's hall.
As for which day to come.. Monday is the shorter day, and may not be as overwhelming. The schedule should hopefully be posted by this weekend (if I can poke Publicity), and you can see what all is offered.