Father's Day
Because you love eco and he loves cars, or tech, or growing things, or board games, or The World's Most Difficult Puzzles, or 3D papercrafting, or planes, or fort-building, or park games, or working-out at home, or chocolate :-)
Or because he needs a 'My Kid's Salon' mani that washes-off in the shower.
All made in Europe (for low toy-miles) from highly-sustainable materials.