Harriet Higher Chair

Cut all the 10° pieces per the cut list, minding which ends are angled and whether the measurement is to the short point or parallel. Build the two side assemblies with 2-1/2" countersunk screws (or pocket screws) and glue, and make them mirror images. If the sides don't match, the finished chair rocks.

Connect the two side assemblies with the front apron/support pieces, same fasteners and glue. Check the frame is square and sits flat before moving on.

Set the 1x12 seat on the frame and fasten it — switch to 2" screws here so nothing pokes up through the seat surface. Screw the side aprons to the seat as well to lock it down.

Assemble the back from the two back supports and the back base with 2-1/2" fasteners, adjusting for square. Attach it to the seat assembly, then screw the backrest to the back supports.

Set the backrest height to the actual child — sitting them in it is the honest way to get it right — level it and screw it home. Sand every edge round, finish with a food-safe product, and fit a safety strap. The wood holds the child up; the strap keeps them in.