Carry Chan(2) Jessica Li(25)
Tina Chan(4) Kitty Wan(34)
Tiffany Cheung(7) Jessica Wan (35)
Use the knife to spread the butter on the
bread because it is too hard to melt.
Knife is a dangerous utensil to children.
They would play with it and may hurt
Would like to produce a butter stick to
improve our daily life.
Butter stick can reduce the danger caused by
using the knife to spread the butter.
Produce a gadget in reducing the danger
caused by using the knife to spread the
Distribute 50 questionnaires to the
housewives for their opinions
Make improvement on our butter stick
Production of the Butter Stick
Boil the butter first.
Then, pour some boiled butter into the
After that, put the butter stick in the
freezer for 15 minutes.
After 15 minutes, take the butter stick
from the freezer and spread it on the
Forces of attraction between a liquid and another surface.
Butter is poured to the container, the adhesive of the butter
penetrates into the small gaps on the container hardens
and does not move any more inside the gap
Chemicals bonds between the butter particles and the
container particles make them stick together butter can go
up and down
Particles in the butter move very quickly as the temperature
increases butter melts
Particles in the butter slow down when we put the stick into
the freezer butter becomes solid
The Effectiveness of the Butter
Spread the butter on the bread by using the
butter stick after 1 hour every time
Can be used to spread the butter on 15 pieces
of the Life Bread
Target is children, so we design to make the
butter stick a bit smaller
Give the butter stick to 30 children to try to
Think that it is so convenient and they feel
curious on how we can make it
43 housewives out of 50 prefer Is the butter stick safe to your children?
butter stick instead of ordinary
butter which is in boxes even though
the price may be slightly higher. disagree
Butter stick is more convenient and
safe to us.
One of them also said that with the agree
butter stick, her son can prepare 74%
the breakfast on his own
7 housewives said that they prefer agree disagree
ordinary butter which is in boxes
because it is cheaper. Is the butter stick a modern invention?
74% housewives think it is safe to
90% housewives think that it is 10%
modern invention and convenient to
Our knowledge is limited.
Room for improvement of our butter
Butter will expand in the freezing
process, we will have to control the
volume of the boiled butter that we
pour into the stick before putting the
stick in the freezer.
Good invention to children.
Children can use the butter stick.
Eliminate the danger caused by using
More convenient than using the knife.
Not only a modern invention, but it is
also convenient and safe to use.
Mr William Lam
for their great support