suggestions??

Any other moms feeling overwhelmed now that we are at the end of pregnancy caring for current children?? I love my kids dearly, but I'm feeling so frustrated and exhausted from cleaning up after them. I'm so sick of looking at toys on the floor I want to toss them all out! They are young and still learning at 5 & 3, but don't seem to understand that we clean up after we are done.  (Despite my efforts to teach this concept.) Any suggestions for getting preschoolers to clean up better after themselves??