Complex sentence: For younger visitors there is pond dipping for invertebrates such as caddisfly, damselfly, leech, flatworm, water boatman, and water skater.
Split into simpler sentences: For younger visitors there is pond dipping. Invertebrates to be found in and around the ponds include the caddisfly, damselfly, leech, flatworm, water boatman, and water skater.