Based on educational resources like Znanija and Skysmart , the exercise usually requires students to:
Use suffixes like -ochk- , -chik- , -ik- , and -k- to give words a "small" or "affectionate" tone.
stolik (table), zerkaltse (mirror), stulchiki (chairs), krovatki (beds). Food: tarelka -> tarelochka (plate), kotletka (cutlet).
kukolki (dolls), mashinki (cars), piramidka (pyramid), loshadka (horse).
Since the exercise asks for a description of a children's space, the tone should be consistently warm or "miniature" without overusing the suffixes to the point of sounding unnatural.