I'm Karl from Haanja. I made the straight line 1m long with tape. Then i started programming, i made a program that made the robot drive for a couple of seconds and turned 180°. But i had to program it, so it would turn 172° because 180° didn't work with the robot. 

My robot drove for 18.6 seconds and the length of the line was 1 m, but it also returned so the full length of the track was 2m.

So i'll calculate my robot's speed.

2/18.5=0.11 m/s

My robot was driving at 0.11 m/s.

When it was driving back it drove a bit further, i itended it because it would've stopped on the line.

I´m Anette from Türi. 
1. My OzoBot drove  forward 1 meter, turned around and came back.

Time was 60,2 seconds. Distance was 2 meters. Speed was 30,1 seconds. 

2. I added the turbo, OzoBot drove  forward 1 meter, turned around and came back.
Time was 28 seconds. Distance was 2 meters. Speed was 14 seconds.