The kids lost the important part that connects the motor to the gear and it can't be found after 3 years in storage.
Reconstructed the part in Fusion and printed in PETG, works like a charm.
Printed with 0.2 layer height on P1P with Overture PETG.
Orient the part flat, needs partial support under the floating part that goes into the motor.
The author marked this model as their own original creation.