I stuck a line of velcro on a board and put pieces of the other side of the velcro on different objects. N enjoyed taking the objects off and I put them back on as fast as I could. The cutting food with velcro already on it, worked well too.
As N gets older, I envision asking her to take off a certain color object or the 1st object in the line or the biggest object. Even B had fun experimenting with the velcro and “helping” his sister.