Earthworms are a great bait for coarse fishing.
Channel: Earthworm
Date: 15/05/2021

How to catch Earthworms for fishing - No tools needed!!
The Amazing World Of Earthworms In The UK - Springwatch - BBC Two
Earthworms produce the so called worm castings, the best fertilizer on earth.  They are the natural recycler's of organic materials and bio degradable waste.  They are simply amazing, her being enthusiastic about it is well justified :)

An earthworm is a terrestrial invertebrate that belongs to the phylum Annelida. They exhibit a tube-within-a-tube body plan, are externally segmented with corresponding internal segmentation, and usually have setae on all segments. They occur worldwide where soil, water, and temperature allow.

Earthworms are a great bait for coarse fishing. Here I share with you the simplest method possible for collecting earthworms for fishing. No tools, no chemicals, no hard labour.
A wonderful piece of fathering. This brought back a lot of happy memories for me. I remember doing the same thing with my dad. Catching worms together and getting up at 5am the next morning to go tench fishing. I'm 63 now. Thanks for the memories. I'm sure your son will look back on these special times spent with you.