Page from the story 'Science Fair Mix-Up' showing the text and an illustration of the main character working on his science project.

Problem Analysis:

The task involves solving a sequence of events related to Harry's science fair project. The goal is to determine the correct order of events based on the clues provided. Here’s a breakdown of the problem:

#### Key Points from the Image:
1. Harry's Project: Harry is working on a project about "How plants grow."
2. Materials Needed: He needs soil, seeds, water, and sunlight.
3. Clues:
- Harry first went to the library to research how plants grow.
- He then bought supplies at a store.
- After that, he planted the seeds in the soil.
- Finally, he observed the growth of the plants over time.

4. Sequence Requirements:
- Arrange the events in the correct order.
- Use numbers (e.g., 1st, 2nd, 3rd, etc.) to indicate the sequence.

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Solution Approach:

To solve this problem, we need to logically arrange the events based on the clues provided. Let’s break it down step by step:

#### Step 1: Identify the Events
From the clues, the main events are:
1. Researching at the library.
2. Buying supplies at a store.
3. Planting the seeds.
4. Observing the growth of the plants.

#### Step 2: Determine the Logical Order
- Researching at the library: This is the first step because Harry needed to gather information about how plants grow before starting his project.
- Buying supplies at a store: After researching, Harry would need to purchase the necessary materials (soil, seeds, water, etc.).
- Planting the seeds: Once he had all the supplies, Harry could plant the seeds in the soil.
- Observing the growth: Finally, after planting, Harry would observe the growth of the plants over time.

#### Step 3: Assign Numbers to the Events
Based on the logical order:
1. 1st: Harry went to the library to research how plants grow.
2. 2nd: Harry bought supplies at a store.
3. 3rd: Harry planted the seeds in the soil.
4. 4th: Harry observed the growth of the plants over time.

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Final Answer:

The correct sequence of events is:

1. 1st: Harry went to the library to research how plants grow.
2. 2nd: Harry bought supplies at a store.
3. 3rd: Harry planted the seeds in the soil.
4. 4th: Harry observed the growth of the plants over time.

$$
\boxed{1. \text{Harry went to the library to research how plants grow.} \\
2. \text{Harry bought supplies at a store.} \\
3. \text{Harry planted the seeds in the soil.} \\
4. \text{Harry observed the growth of the plants over time.}}
$$