1-In spring place cocoons and clean bricks outside.

2-Adult bees emerge from cocoons and mate.

3-They lay their eggs in cavities/tunnels, leaving pollen and nectar for each egg.

4-The eggs hatch!

5-The babies eat grow all summer long.

6-They make their cocoons and hibernate.

7-In Fall:

Separate bricks

Remove cocoons

Wash, rinse, dry cocoons

Clean bricks

8-Store cocoons in fridge until spring and the cycle starts again.