Our favourite London mini rave crew Big Fish Little Fish take over Acklam Village Market for another glittery, swirly, bubbly party. DJ Slipmatt makes his BFLF debut on the multi sensory dancefloor with glitter cannons, lights, bubbles and giant parachute dance. Captain Cookie leads the crafting activities for kids – play with play dough, and colour in a giant mural. Plus there’s a play area with tents and tunnels and a Villa Pia baby chill out space with soft mats, beanbags and ball pool. W10. Adults £9, kids £6. Saturday September 11. More here
See the sails of the wonderfully eccentric Brixton Windmill draped in Eley Kishimoto designs this Sunday, as Harvest Festival and Brixton Design Trail coincide. Join woodworking, haystack building and corndolly workshops, watch flour being ground, and pet the animals from Brixton City Farm. SW2. Free. Sunday 18 2–5pm. More here
At this month’s Royal Academy Workshop – Take Me Away, you’ll be inspired by the utopian themes of the Peter Cook exhibition, Floating Ideas. Build structures with a huge range of materials, and learn how contemporary constructions are created. The RA workshops are always popular; get there early to be sure of a place. W1. Free. Sunday 18, 11am–3pm. More here
Chuseok is the Korean Harvest Moon Festival. Find out more about the lunar-tic party and celebrate at the British Museum on Saturday 17. Enjoy traditional music, watch K-Pop dance performances, go crazy in a costumed photo booth, and draw moon jars and express your dreams in a workshop with artist Ik-Joong Kang. WC1. Free. Saturday 17, 11am–4.30pm. More here
Let’s celebrate one of the most overlooked (literally) London attractions – The Thames. There’s a whole new flotilla of Totally Thames events this weekend. Head to Brentford to play in a giant sandpit, explore the lives of river dwellers, and walk beneath the river (free), go for a family walk along the riverside and try birdwatching in Fulham (free, book in advance), watch the Thames Barge parade in West India Docks (free), and comb the foreshore near the Tower of London for historical objects (free). All weekend. Across London. Full programme here
The brutalist walkways and new-build flats of Thamesmead will be awash with culture this weekend, as the area celebrates some of its most creative artists, as well as welcoming those from the rest of London. There will be live African music, dream jar, boat-making and lego workshops, walking tours, a pop-up bike shop – try out an electric bike or make a pedal-powered smoothie – and a free, outdoor screening of Chitty Chitty Bang Bang. All weekend, programme here
Hurrah, it’s Open House weekend, two days when the city’s doors that are usually shut, creak open and let us have a peek inside. Although you needed to enter a ballot to get tickets for a few, very select addresses (including 10 Downing Street!), you can just walk up to most participating buildings and stroll in. Take a lift up the Gherkin, wander around the Lloyds Building, or explore The Freemasons Hall (there’s a full list here). Take advantage of the full programme of family activities at some venues; get a bird’s-eye view of the city, and create a future, crazy London skyline at City Hall, or design a pavilion of the future with real-life architects at the Serpentine Pavilion. More about Open House Junior here. Free. Across London. September 17-18 10am–5pm, tours and workshops at various times.