Duplo Excavator Boom Extender
Extension piece for Duplo excavator and construction toys...they connect between the construction toy bases and whichever end attachment (scoop, bucket, hook, etc.) you're using. You can connect multiple of these pieces together to make super long, flexible "boom" arms.
I printed it rotated with the narrower "male" end down, with supports on base plate. I used PETG as it can flex more than PLA and keeps the "female" end from breaking.