this is a knex hammer maybe you can give it to your younger bro/sis

Step 1: Parts

these are the parts you will need:
4 yellow rods
4 green rods
4 white rods
2 yellow connectors
2 orange connectors
2 red connectors
2 grey connectors (2 way)
2 grey connectors (1 way)
2 green connectors

Step 2: Handle

build it

Step 3: Grey Connector

build 2

Step 4: Grey Connector

add it

Step 5: Connect

connect them

Step 6: Done!

now your done you can play with it or give it as a gift or just leave on a table and let it look good Bye!