Fun and creativity are the order of the day with these PBLs! Even the most reluctant students love these PBLs because they focus on each child's personal interests. As they research and create their dream bedroom/kid cave and draw it out on grid paper (included), they gain an understanding of design and spatial relations, as well as real-life budgeting, opportunity cost and unit conversions. This resource contains two PBLs, one for 3rd grade and one for 4th-5th grades. Third graders will apply knowledge of 2-D figures, area, perimeter, measurement and money/budgeting to create their dream bedroom/kid cave. Fifth graders will apply the skills above, as well as applying volume to 3-D figures. A reference citation page and budgeting page are included. Full differentiation is easily achieved, depending on what parts of the PBL you select for your students to complete.