I am all about any opportunity to throw a little science into our lives. I love having kids make ongoing observations to record changes or growth. We planted a bulb in this little pot and decided to note the growth in some simple little observation books. Both kids have them, Bee's are more presentable. We just stapled a few pages of copy paper together and made a little cover.
Note our special scientific measuring system stuck in the pot. It's a pencil, the most accurate of all measuring devises.
We aren't recording each day, although if you were using something other than a pencil to measure, you sure could. We are doing every few days, specifically when there are notable changes. Here's one days notes. Sometimes we just draw, other times its a drawing and a sentence or two. This can totally be adapted for any age or grade.