I know it's just a toy, but this makes me twitch!! my daughter had a playdate the day after her birthday and they mixed 5 CANS together to make...sludge. she followed the other LO's lead, and hasn't since. But I just took a quick shower and she mixed a bunch of sparkly ones together..sigh. luckily they look more tie-dye than sludge, but it drives me nuts
does your LO mix colors? or leave them separate?