Using bottle caps, boxes, packages with lettering, numbers, or pictures on them.
putting in and taking out a extra piece of the table; removing rust from a utensil; an adult playing with a child Lego, fixing...
Folding Napkins and Little Children Folding Paper;
(Squeezing materials.) how to work with various types of brushes on Shabbos. (E.g., toothbrush, baby bottle brush, etc.);