There was a children’s crafting encyclopedia set — called Childcraft, I think! — that taught you how, with a shoebox first filled with the surprises and masking-taped, and various features done in cut-up paper towel roll. Square Donkey and Square Pig with Curling-Ribbon Tail are the variants I recall trying out. Child’s piñata for this weekend is VERY 1983 Square Donkey.