North Dulwich after school and weekend activities for 4yo

[Sesame]

All,

We are looking for sports clubs and activities our 4 year old can engage in after school and on the weekends. We are new to the area and only know of clubs offered at our school (JKPS) which isn't a lot for his age. Is there a comprehensive list available somewhere like the one Southwark compiles for baby groups? Also interested in German and Russian speaking groups. Thank you!