Fig. 1. Swinging on a rope-ladder
Fig. 2. Catching up objects with free hand in course of swinging

Fig. 3. Sitting motionless on rope ladder
Fig. 4. Playful mood during swinging

Fig. 1. Astonishment at seeing own image
Fig. 2. Seeking for something beyond mirror

Fig. 3. Threatening gesture directed against image; banging with fist
Fig. 4. Grimaces in front of mirror (cracking of lips)

Fig. 1. Joni's wrist (seen from above, wax cast from dead animal)
Fig. 2. Roody's (at 7) wrist (seen from above)

Fig. 3. Joni's wrist (seen from below)
Fig. 4. Roody's (at 7) wrist (seen from below)

Fig. 1. Joni's sole of foot (seen from above, wax cast from dead animal)
Fig. 2. Roody's sole of foot (seen from above)

Fig. 3. Joni's sole of foot (seen from below)
Fig. 4. Roody's sole of foot (seen from below)

Fig. 1. First attempts at sitting (Roody, at 5 months)
Fig. 2. Roody (at 3½ years) sitting on heels
Fig. 3. Joni squatting

Fig. 4. Roody (at 1 year 2 months) sitting on heels
Fig. 5. Joni sitting on bench
Fig. 6. Roody (at 3 years) sitting on bench

Fig. 1. Roody (at 5 years) standing
Fig. 3. Joni (at 4 years) standing

Fig. 3. Sitting with legs freely hanging down (Roody, at 5 years)
Fig. 4. Sitting with legs freely hanging down (Joni, at 4 years)

Fig. 1. Roody's (at 5 months) first attempts to stand up
Fig. 2. Roody's (at 6 months) standing posture strongly leaning upon arms
Fig. 3. Roody's (at 9 months) standing posture, slightly leaning upon arms

Fig. 4. Roody (at 1 year) standing erect, but with poor stability
Fig. 5. Joni's typical erect standing
Fig. 6. Roody (at 4 years) standing with full equilibrium