Handyman - Carpetry - Build three 9"x30"x30" wood boxes

Build three 9" (height) x 30" (width) x 30" (depth) boxes. Raw lumber, nothing fancy, but should be very sturdy (they will be used as 'walk boxes', each filled with a different materials [sand, gravel etc.] to record footsteps in college film audio studio). All sides approx 1" thick. Boxes should have hinged lid and fully open.

Ideally you purchase supplies and deliver (Greenpoint, Brooklyn). Will need a receipt for my reimbursement by college.