website: http://montclairsoccer.pbworks.com/

Re: Soccer for a 5 year old
Montclair Soccer (and I think the other Jack London Soccer leagues -- Rockridge, West Oakland, Piedmont, etc.) offers low-key Spring Soccer starting in March (registering now), including for U6 (5yo) players. My 5yo played U6 soccer last fall and had a great time. There's more info here: https://montclairsoccer.pbwiki.com/Spring-Soccer, and the main Jack London site is http://www.jlysl.org/ Soccer Mom