have the umbrella have a number on it on a board, hand each kid a few raindrops and then call up the number on the umbrella. say "who has 'one' raindrop" they will come up, find and place it on umbrella w matching number.
Plastiquem: PLOU I TOTS ANEM AMB PARAIGÜES. Crayon and watercolor umbrella drawings. Crayon resist with blue water correct over white crayon. Or cool colors over white crayon and make the umbrella warm colors only.