Your body is too weak to stand up right now, but you're at least able to turn over and get on your hands and knees. Crawling's still an issue, but you can make a slow crawl forward to... well, you're not sure what to do now. Now that your development was now under 1 year old, it's not like you can do much anyway. All you can really do is eat (what exactly did babies your age eat), pee and poop yourself, crawl, and play with the toys that were considered appropriate enough for a baby your age.
"Sweetie." You turned around to see your mother, a slightly worried look on her face. "How'd you get out of your playpen?" She comes over and quickly lifts you up, surprising you with her strength as she places you into your playpen. "What's this?" She leaned down and picked up the notebook. Your eyes widened; what was she going to do next?