Grandpa's poems part 4 (sort of)

When I found those other poems by Grandpa I found the following work, written in his hand on a scrap of paper. At the bottom he wrote: "Poem by Keith". I have absolutely no memory of writing this, and it is in his handwriting.

Seals

As the seals bark
I watch them play
One was lazy
And decided to lay

The others all bright
Swam in delight
One hit another
And had a fight


So, did I really write this? At what age? Questions destined to never have answers...