Balance Board

 A simple printable part that is attached with glue, contact cement was used, to a board. Bolts can be added for additional support but hasn't seemed necessary.  The wood was scrap from a shipping crate but nicer, pre-cut, 12 inch diameter boards can be purchased from most chain hardware stores (I've seen $10-15 USD).

Printed with: 

• 0.25 layer thickness
• 1.2mm perimeters 
• 0.75 bottom layers
• 1.25 top layers
• 3D infill 20%

Please make sure the material is well laminated before using. Flaws in the construction could lead to injuries. Not recommend for hardwood floors but a few coats of Plasti Dip might be sufficient. Grip tape is optional for rough wood but recommended for the smooth store-bought pieces.