Dispatch mayonnaise in a small cup, you will use it to glue heavier features onto rice balls.
Use small scissor to cut out 2 brows for the red bird, 6 larger circles for eyes background and 6 smaller dots for pupils.
Also cut 2 piece of funky crown out of nori.
Use a straw or similar to cut out 6 circles of the boiled egg white.
Cut a heart shape out of tomato to make crown for the red bird. Also two eyebrows for the yellow bird, you can use either tomato or carrot for this.
The pig mouth nose can be cut out from cucumber, green broccoli, or just use the shell of the edaname. Use two inner peas for pig ears.
Now just glue all features onto each respective bird. For heavier parts such as beaks, crown, pig ear, use a tooth pick or just crack some chips into long shafts to connect them.