This L=450mm small wooden bat and a red ball set, which appears to be a rounders or mini-cricket game set.
Sporting Goods
The wooden bat and red ball are part of a casual outdoor game set, often referred to as rounders, mini-cricket, or a general "bat and ball" set.
These sets are widely available for family fun in gardens, parks, or on beaches.
Similar sets typically cost between £6 and £16 GBP.