Playing at the park and first words

We enjoyed a nice day at the park. Axel loves collecting rocks (where ever we go) and Abel really played. He was crawling all over and loved the slide.
 I have forgotten to write that Abel has a few words that he can say. His first word was "this". He also says "Yeah" and "ouch". (that one I have only heard twice but it counts) He makes tons of sounds and his favorite one is da-da. Not sure if he is for sure saying daddy yet. I have also heard him saying mum mum-or some thing like that- I count this as saying Mom. Pretty cool though!