After the the two
rivers, head to the left and you'll find a hole. Hop in
this hole and launch Kirby onto the brown blocks (you must
launch Kirby to the left perfectly). Roll along these
blocks to find the blue star to the right!
Red Star
After the mid-way point,
head left for an area with red bumpers. Knock out the red
bumper to the left by hitting it several times, and you'll
find another red bumper. Knock this out as well, and find
the red star under it! (You may have to roll around to
make it appear).