Fig. 1. Roody (1 y. 2 m.) opens mouth in course of contemplating intriguing object
Fig. 2. Tightly compressed lips and eager movement of hands (Roody 1 y. 2 m.)

Fig. 3. Drawing arms aside while astonished (Roody 1 y. 1 m.)
Fig. 4. Feeling intriguing object with mouth (Roody 1 y. 1 m.)

Fig. 1. Roody (4 m.) in the act of sucking
Fig. 2. Roody (5 m.) sucking his hand
Fig. 3. Roody (9 m.) touching metallic object with mouth

Fig. 4. Roody (9 m.) touching "metallic basin with mouth
Fig. 5. Roody (9 m.) touching metallic rattle with mouth
Fig. 6. Roody (3 years) sucking his thumb while listening to reading

Fig. 1. Roody (1 y. 2 m.) examines and touches anthor's eyes
Fig. 2. Joni examines and touches human hair
Fig. 3. Roody (1 y. 4 m.) examines and touches human ears

Fig. 4. Roody (1 y. 4 m.) examines and touches face of doll
Fig. 5. Joni examines and touches a scratch on human hand
Fig. 6. Roody (1 y. 2 m.) examines and touches human face

Fig. 1. Roody (2 y. 5 m.) looks into mirror; touching miror-image with face
Fig. 2. Joni looks into mirror, examines his image
Fig. 3. Roody touches mirror-image

Fig. 4. Joni draws mirror to himself
Fig. 5. Roody's grimaces before mirror
Fig. 6. Joni's grimaces before mirror

Fig. 1. Roody (1 year) puts index finger into hole
Fig. 2. Roody (1 year) sucking finger
Fig. 3. Roody (9 m.) tearing hole open

Fig. 4. Roody (9 m.) opening table-lid with index-finger
Fig. 5. Roody (2 y. 2 m. 8 d.) takes out different things
Fig. 6. Roody's (9 m.) exploration of the depth of boxes

Fig. 1. Roody (1 y.) points to intriguing object
Fig. 2. Roody (2 y. 1 m.) points to intriguing object with index-finger
Fig. 3. Roody (1 y. 2 m.) points to direction in which he wants to go

Fig. 4. Roody (1 y. 3 m.) points to object which he wants to acquire
Fig. 5. Joni touches intriguing object with index-finger
Fig. 6. Roody (1 y. 5 m.) touches intriguing object with index-finger

Fig. 1. Gathering bread-crumbs (Roody 9 m.)
Fig. 2. Gathering bread-crumbs (Roody 9 m.)
Fig. 3. “I like all that's very small!” (Roody 2 y. 3 m.)

Fig. 4. Gathering little stones (Roody 1 y. 5 m.)
Fig. 5. Examining minute snails
Fig. 6. It's the smallest hair who gets the gun (as a special distinction).

Fig. 1. Demolishing part of a brick house (Roody 1 y. 5 m.)
Fig. 2. Demolishing almost all the brick house (Roody 1 y. 5 m.)
Fig. 3. Destroying a self-made pillar (Roody 4 y. 1 m.)

Fig. 4. Throwing pebbles into a pool of water (Roody 1 y. 7 m.)
Fig. 5. Kicking up a twig with stick (Roody 3 y. 3 m.)
Fig. 6. Directionalized throwing of stick