Kilkhampton with 10 years old

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Any recommendations what to do near Kilkhampton with two 10 years old kids?

There’s cycle hire, paddleboarding, kayaking and canoeing at Tamar Lakes.
Monster Slip and Slide waterpark just outside Bude
At Crooklets, Summerleaze, Widemouth, Nortcott, Sandymouth and Duckpool there are plenty of rockpools at low tide.
At the end of the canal on Summerleaze Beach there is a river that runs down to the sea with a concrete footbridge over it - great spot for crabbing!
There’s a fun Segway place at Bude.
The Milky Way Adventure Park just over the border in Devon is good.

Any animal parks, gardens or mansions/castles worth visiting?

The Big Sheep
North Devon Bird of Prey Centre
RHS Rosemoor

Many thanks. We also want to visit Clovelly Village that is apparently lovely

Any sandy beaches in the area to build castles!