Material preparation: Lego bricks (various types and colors), Lego shafts and bushings, Lego gears and racks, Lego pistons and pumps, beverage containers (suitable for Lego size), connecting pipes, decorative bricks and details, and Lego programmers (optional).

1. Discuss with children the function and appearance of the beverage machine they want to make. Help them understand the importance of design drawings and encourage them to draw their own designs. Use Lego CAD software or online drawing tools to draw the design of beverage machine. Ensure that all required Lego parts and connection methods are detailed in the drawings.

2. According to the design drawings, assemble the base and bracket of the beverage machine with Lego bricks and shaft sleeves. Ensure that the bracket can firmly support the beverage container. Add decorative bricks and details to increase the aesthetic feeling.

3. Install the piston and pump on the bracket, and connect the piston and pump with Lego shaft and rack and pinion transmission system. Ensure that the piston moves smoothly up and down and is well connected with the pump. Test the working effect of piston and pump to ensure their normal work.

4. Connect the beverage container with the pump by using the connecting pipe. Ensure that the connecting pipes are unblocked and tightly connected to prevent leakage. Decorative bricks or details can be added to the connecting pipe to increase the aesthetics.

5. Use the programmer to input control instructions (such as the number or intensity of pressing the piston) into the beverage machine. You can choose simple programming tasks according to your child's age and skill level, such as letting a certain amount of drinks flow out every time you press the piston. Test the control function of the beverage machine to ensure that the programming instructions can be executed correctly.

Skills of spelling Lego:

1. Assemble according to drawings and instructions.

Before assembly, please read the drawings carefully to understand the purpose and assembly sequence of each component. For more complicated parts, you can consult an experienced person or refer to a video tutorial.

Step 2 use the right tools

Lego can be assembled more conveniently by using appropriate tools such as pliers to handle small parts and lubricants to reduce friction.

3. Pay attention to detail and quality

In the process of assembly, attention should be paid to details and quality to ensure that all parts are assembled correctly and closely. At the same time, be patient and careful, and don't rush for success.

4, refer to other people's experience

You can learn about other people's assembly experience and skills by consulting Lego community or related websites, which can help you master assembly skills faster and improve assembly level.

5. Practice and try again and again

Spelling Lego requires constant practice and repeated attempts. Only through constant practice can we improve our skills and level.