Submitted to Westminster City Council, the proposed jolly and mischievous structure, drawn up by the Archigram founder, will sit alongside this years Serpentine Pavilion by Bangladeshi architect Marina Tabassum, unveiled last month.The Serpentine Galleries said in planning documents that Cook had been invited to draw up a second summer pavilion inspired by Hadid, the architect behind the inaugural Serpentine Pavilion 25 years ago.Cooks hemispherical pop-up pavilion, which will stand between June and August, takes inspiration from Hadids credo that there should be no end to experimentation, which was also the title of a 2017 exhibition about her work, planning documents say.AdvertisementSitting on a circular base, the proposed play pavilion features timber walls and a hemispherical roof covering formed of faceted steel sections supported by four hidden steel columns. At its tallest point, the pavilion will reach 7.8m high.Planning documents say the dome roof will be of lightweight construction, using both translucent and opaque prestressed membranes to form the cladding. LEGO bricks will also be integrated into the multi-coloured faade of the 87m design.Cooks play-focused pavilion will be erected near to this years main Serpentine pavilion, which the Serpentine Galleries revealed last month is the brainchild of Tabassum: an architect, educator and founder of Marina Tabassum Architects (MTA).The 56-year-old Dhaka-born architects proposal for the temporary structure in Londons Kensington Gardens will be the 24th in the gallerys ongoing series of annual architectural commissions. It is due to open on 6 June and will remain open until 26 October.Cooks play pavilion is scheduled to open on 11 June and would run until 10 August, subject to planning.AdvertisementSerpentine Galleries have contacted for comment. Source:Peter CookPeter Cook's proposed Serpentine play pavilion (2025)Architects statementPlay transcends survival, achievement and common sense. It encourages, or at least permits us, to explore and idly delight in a territory between the wayward and speculative towards unashamed amusement.A pavilion, among the trees, neighbours a famous institution, sits across from the Serpentine 2025 pavilion, and is a hop, skip and a jump away from the iconic Serpentine Lake. It thus plays a reciprocal role the fool, the joker, the mischievous child offering audiences a chance to come inside, play WITH it and become part of this jolly thing.It is a piece of theatre. From a distance, intriguing shapes rise from within the structure, although partly obscured. Activities inside can be viewed through pierced and scooped walls, as if teasing 'come closer, theres more'. A child might pop out on a slide, another may crawl through a hole on the ground, mystifying conventional entrance routes. Another, mouth-shaped opening, reveals an orator, performer, or singer entertaining eavesdroppers beyond.The entire play pavilion is a graphic toy. Inside there are large swathes of textured panels inviting visitors to make their own castles, forests, homes, space-worlds or entirely random inventions, contributing to the overall Gesamtkunstwerk. Its a space for gatherings, small events, workshops and performances.The play pavilion is a dome with surfaces that vary in intensity. Its colourful dome transition toward a translucent base, playing against the vibrant towers, or stalagmites, rising from within. Active by day and dream-like at dusk, it glows like a lantern. In contrast to the austere monuments that populate the parks, it reminds us we should never take ourselves too seriously.Peter Cook, (in planning documents)