(Age: 4+) With a little time and effort you can make jam jars that will always be full.
MATERIALS NEEDED:
EMPTY JARS OF ALL SIZES, CREPE PAPER IN DIFFERENT COLOURS, PIECES OF STRING, LABELS
HOW TO MAKE IT:

Tear big pieces of crepe paper and crumple them. Push the crumpled paper into the jars

Instead of lids close the jars with crepe paper of different colour and tie it with a piece of string around it. Label the jars either in writing or drawing.