Clam

This is not my design.

This is scaled to 150% so it is safer for smaller kids to play with (3.5"x2.7"x1.57"). The horizontal orientation gives the clam shell more realistic texture and makes it grippy when used as a water toy. 3 walls and 5% infill keeps it strong enough from being crushed under normal use, but still floats in water.

I tried the vertical orientation. It uses less supports, but texture isn't to my liking. I included it anyway in case others may actually like it.

I used 220 grit sandpaper to knock down any support material that refused to cooperate.