Events, family activities and fun days out in the capital and beyond: Friday 4 - Sunday 6 June.
We Londoners love an excuse to party outdoors in fine weather, especially if there's food and drink to hand, a decent setting and a few attractions to keep the young'uns occupied.
If there's a theme involved, too... well, so much the better. Let's get it on with three of the weekend's best:
Participating restaurants include Mango Tree and Busaba Eathai
Tickle your taste buds at Thailand at Trafalgar Square, where you can try exotic dishes from restaurants including Mango Tree, Thai Square and Busaba Eathai.
You can also buy crafts and spa products and enjoy demonstrations of puppetry, dancing and Thai boxing; a photo exhibit in a special Thai-style pavilion, meanwhile, will commemorate the King and Queen of Thailand's State Visit to London in 1960.
Thailand at Trafalgar Square, Saturday 5 June, Trafalgar Square WC2, 12noon - 8pm. Free admission.
Neighbourhoods in and around west London are gearing up for fun-in-the-sun with the Paddington Festival, yolking a programme of music, dance, theatre and film with related happenings at local art galleries, guided walks, wine-tastings and celebrity-led karaoke nights.
Rapper Akala is the younger brother of singer Ms Dynamite
The three-month long event kicks off with its own launch day on Saturday - expect steel bands, face painting, food providers and performances from MOBO award winning rap star Akala, local dance group Hypnotick and more.
A number of family all-dayers will follow, starting with the Westbourne Fair on 27 June; the festival website has details and full listings to the end of August.
Paddington Festival launch day, Saturday 5 June, Maida Hill Market, Harrow Road W9, 12noon - 3pm. Free admission.
Finally, a fiesta to finish off our weekend threesome with Regent Street's A Taste of Spain.
Giant paella, anyone?
The menu boasts food and flamenco of course, and interactive sports in the form of F1 and MotoGP simulators, Wii tennis, virtual horse riding and a full scale Scalextric track.
Organisers are also promising giant paellas and medieval food markets, plus to speed the party along, there's music on the main stage from guitarist Paco Fernández, indie artist Annie B Sweet and brass band Charanga La Chicuelina.
A Taste of Spain, Sunday 6 June, Regent Street W1 (closed to traffic), 12noon - 7pm. Free admission.
Calling all nature detectives
Fancy going on a bug hunt, netting a butterfly or doing a spot of worm chanting?
How about making a mini beast hotel or building a bat box?
The Wild Day Out marks 2010's International Year of Biodiversity
Our Springwatch Wild Day Out has all of these and more - including a chance to join scientists from the Natural History Museum as they take part in a BioBlitz, a huge wildlife hunt against the clock.
Help them spot as many species as possible and then learn what you can do to help nature when you get home.
Keep an eye out also for BBC London's Alice Bhandhukravi; she'll be appearing live on the Big Screen with regular updates on the day's fascinating finds and talking to scientists and wildlife experts.
You can follow the action and commentary online, but better still bring the family, bring a picnic and make a proper day of it.
Springwatch Wild Day Out, Saturday 5 June, Alexandra Palace Park, Alexandra Palace Way, Wood Green N22, 11am - 5pm. Free admission.
Art in the ring
There's nothing staid about the Vauxhall Art Car Boot Fair - not when car booters include the likes of Sir Peter Blake, Turner Prize winner Martin Creed and Kentish renaissance man Billy Childish.
The fair also features a wrestling-inspired car beside the main ring
Art bargains can be had and haggled over in the usual way, but this year brings a new element: a wrestling ring featuring bouts of old school grappling interspersed with impromptu auctions and live music performances.
Over 60 pitches are promised along with 'artful' games and gaming, say organisers.
There's food and drink as well from local outlets The East Room, La Grotta and St. John Bread & Wine.
Vauxhall Art Car Boot Fair, Sunday 6 June, The Old Truman Brewery, 146 Brick Lane E1, 12noon - 6pm. Tickets £4.
Get on the right track
Release your inner child at the Royal Arsenal in Woolwich, once home to its own 47-mile long rail network and now playing host to this year's Model Railway Exhibition.
Enthusiasts will thrill to the sight of nearly two dozen extensive model rail layouts, some featuring a military theme, others representing different eras and locations around the world.
Hornby is still one of the key names in model railways
This is one of the capital's biggest events of its kind; some 50 trade stands will also be on-site to sell books, tools - and model railways of course.
Settle back and lose yourself in a world of OO gauge, radius three track and long wheel length locomotives.
Model Railway Exhibition, Saturday 5 & Sunday 6 June, Firepower, Royal Artillery Museum, Royal Arsenal, Woolwich SE18, from 10.30am both days. Admission, incl exhibition £5 adults, £2.50 children, under-5s free, family tickets available.