I printed a few Duplo compatible pieces so my daughter could build a park (started with these awesome slides. When I asked her what to print next she asked for a swing, I searched Makerworld and didn't find anything so decided to have a go modelling it myself.

I have tried to make it easy to print with no supports so some assembly is required. Putting it together is fairly straightforward:

1. The "chains" should be connected to the seat first by sliding them in sideways and rotating them.
2. The "chains" can then be clipped over the top frame by pushing them in the grooves provided.
3. The side legs can be pushed onto the top frame, you can optionally glue these in place if the fit isn't tight enough.

I used hexagons in the legs to attach to another Duplo brick so it can be printed without any supports.

I printed it in Matte PLA and in PETG and found that the PETG would swing better, but the PLA started swinging better after playing with it.