Wooden blocks are definitely not all the same, and if you are looking for a different kind of block to help spark the imagination of your students, then you’ll love the AAA Playground 18 Piece Hollow Building Block Set. These oversized blocks are hollow, and this factor opens up a range of new building and play possibilities. This set includes eighteen blocks in all and features several different shapes including two-flat boards, one half wide ramp, two full units and more. Offering a limited lifetime warranty and constructed of durable, high quality hardwood, these blocks will provide years of service.