Beavers do their best at home and for every good deed they tie a knot in the mouse tail
Copy of the Good Turn Knot for every beaver, string,
Punch a hole in the mouse and tie a string, cover hole with tape to prevent tearing.
Split into groups and practice/teach overhand knots, for those that manage quite well practice/teach reef knots.
Explain to beavers that for every good deed they do at home they have to tie a knot in his tail and ask them to bring it in next week to discuss the good deeds they have done.