Stubby Handle Siren Thunderbolt

This is a Small siren Thunderbolt it is designed for kids, which is why it has rounded corners and a small handle it gives the print a bit more durability than some of the other ones I have found online. The handle prints with supports, but is mostly printed in place besides that. I couldn't figure out how to add a curved path on top of another curved path if you guys know how to do that in Fusion 360, Solidworks or Onshape let me know I wasn't able to figure out how to model this correctly mostly because I didn't know what it was called. This model is close to a Thunderbolt siren and still works as a siren.