If you examine these closely, there is a blue doll with 4 buttons and a yellow doll with 1 button.
There are also 2 small dolls inside the drawer.
Find a horse (6/10) inside and place it on the carousel. Find yellow and green balls in low unlocked cupboards and insert these in the other 2 holes. Place the red ball in the left round hole above the last drawer you opened. Look at the mirror on the wall and you will see that there are 3 colored lights from left to right these are red, yellow and green. Pick up the horse (5/10) that drops to the floor and put it on the carousel. Take the nail from inside this drawer and use it to pop the balloon in the middle of the room. Grab another horse (4/10) from here and put it on the carousel above. Look for a drawer to the right that has 4 colored stripes on it, and enter the code 5423 on its keypad to open it. It has a series of colored stripes on the pants - 5 blue, 4 green, 2 yellow and 3 red. Pick up the clown costume from inside the chest and look at it closely. Collect the next horse (3/10) and add it to the carousel. Turn right and look down at a chest with another marionette and a keypad.
If you examine these closely you will see each has a number of brighter symbols on its clothing, and these number 2, 5, 1 and 3 from left to right. Pick it up and hang it on the wall with the other three. There is a creepy marionette doll inside the drawer you just opened. Take the horse (2/10) from inside and add it to the carousel. Find the drawer with the hat symbol and enter the code 3621 to open it. Looking back at the shelves on the wall, there is a hat missing from the first one, and there are hats with 6, 2 and 1 pom-poms on the others. You will also find a hat with 3 red pom-poms on it inside the drawer. Take the horse (1/10) and place it on the small carousel on the opposite side of the room. Based on the order of the triangles on the drawer and on the shelves, enter the code 3214 to open this drawer. Now turn to the left and find a drawer with 4 colored triangles and a keypad. From left to right these are blue, red, yellow and green. Each has an object with a colored triangle. Look at the 4 small shelves high up on the wall.