Phase 2 :
Group 1:

• worked in pairs
• used strings to cut the size of circumference to put them vertically on a bulletin board plus add some captions.
• several attempts before successfully measured

Group 2:

• used blocks and plank
• created inclined planes of various angles
• balls were rolled 
• which ball rolled faster, further...
• did the activity on several different surfaces (carpet, glass)
•  during which they enjoyed the term resistance that slowed down the roll

Group 3:

• rubbings of surfaces of each balls
• discussion of various surfaces with other classmates 
• all children were surprised with the variety of surfaces.

Group 4:

• built a block structure several feet in height
• tape measure suspended from the top
• predicted, then measured the height of each bounce
• CONTRARY TO THEIR PREDICTIONS, NOT ALL BALLS BOUNCED.

The TEACHER engaged them in discussion of what might be inside the balls,, and she explored the words 

• hollow
• solid
• empty
• full

all balls were opened and examined except the golf ball, in addition they couldn't open the bowling ball so they asked the help of a parent.

In the end, bar graphs and pie charts were created by the help of the teacher's support and guidance to indicate in three columns the questions posed in the survey, the predicted answers, and the actual answer.

Phase 3:

 children completed their investigation, they displayed their findings through creating stories and charts, looked up for things related to the topic of interest in the library with the assistance of the librarian...

This project provided contexts for analyzing,hypothesizing, predicting, observing, recording, and

representing research findings. It provided settings for extensive discussions, working out disagreements, arguing, and checking the facts. It also provided contexts and pretexts for cooperation, individual initiative, sharing responsibilities, and many other developing intellectual as well as social capacities and dispositions. Children of all cultures and language backgrounds can become deeply

engaged in the kinds of intellectual explorations such items in their own environments can provide.