FREE LEGO FLOWERS : Through April 30, spending $40 at Lego.com unlocks a free Lego Botanicals Field Flowers set . We're approaching official "pull off on the side of the road to pick flowers" season. Lego is celebrating by giving away free Lego Botanicals Field Flowers sets to anyone who spends $40 at Lego.com through April 30. The Field Flowers set includes two dandelions (the wispy gray kind that you blow on and the regular yellow kind) and an ear of wheat. Though bags of 100 pieces or less typically only go for $5, most free sets can't typically be purchased separately — so this is still an exclusive grab. Mashable Trend Report Sets that'll quickly get you to the $40 point include the Lego Botanicals Magnolia Branches for $49.99, Lego Star Wars AT-RT Attack set for $44.99, Lego Mario Kart Piranha Plant Power-Up Pursuit set for $49.99, Lego Jurassic World Dinosaur Fossils: Triceratops Skull for $44.99, or Lego Botanicals Tiny Planets set for $49.99.…